Re: [PATCH] f2fs: avoid potential int overflow in sanity_check_area_boundary()

On 2024/7/25 1:51, Nikita Zhandarovich wrote:

While calculating the end addresses of main area and segment 0, u32 may be not enough to hold the result without the danger of int overflow.

Just in case, play it safe and cast one of the operands to a wider type (u64). Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE.

Fixes: fd694733d523 ("f2fs: cover large section in sanity check of super") Cc: stable@vger.kernel.org Signed-off-by: Nikita Zhandarovich n.zhandarovich@fintech.ru

Reviewed-by: Chao Yu chao@kernel.org

Thanks,